Label arithmetic · NIH DSLD 23167
PureBulk.com Magnesium Hydroxide: 417 mg of magnesium per 1000 mg, 250 servings
417 mg of magnesium in each 1000 mg, about 250 servings per 250 g. Hydroxide is 41.7% magnesium. Inside: salt per scoop, %DV check.
PureBulk.com Magnesium Hydroxide declares 417 mg of elemental magnesium per serving as hydroxide, which means 1,000 mg of magnesium hydroxide powder in one serving, compared with 1,100 mg in the largest standard capsule; that is the weight of the salt alone, before any fillers or flavours in the scoop. No US retail price matched as of 2026-11-02; 0 of the 5 hydroxide labels in this registry have a matched price. NIH DSLD 23167, label dated 2013-06-25.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 7,116 |
| orotate |
| 5,736 |
| L-threonate |
| 5,055 |
| taurate |
| 4,675 |
| lactate |
| 3,472 |
| glycerophosphate |
| 3,336 |
| glycinate |
| 2,957 |
| malate |
| 2,683 |
| aspartate |
| 2,666 |
| citrate |
| 2,580 |
| sulfate |
| 2,065 |
| chloride |
| 1,633 |
| carbonate |
| 1,446 |
| hydroxide |
| 1,000 |
| oxide |
| 691 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 1,000 mg per serving · Price: none matched · % DV: 104% vs 99%
Elemental: The magnesium itself; the rest of the compound weight is the partner molecule.
Compound: The whole salt, such as magnesium glycinate, that must physically fit in the capsule.
Size 000: The largest standard capsule, about 1,100 mg of powder at 0.8 g/mL, the top of the usual 0.6–0.8 range; size 00 holds about 730 mg and size 0 about 545 mg.
Recompute with your price
Enter the price you paid; the declared amount and servings of this label are prefilled, so the result is the cost per 100 mg of elemental magnesium for your bottle.
Same-salt comparison appears here.
How much hydroxide powder is in one scoop?
PureBulk.com Magnesium Hydroxide carries 1,000 mg of magnesium hydroxide per serving for 417 mg of elemental magnesium, against 1,100 mg in the largest standard capsule; capsule capacities do not apply to this powder.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 417 mg |
| Units per serving | Not a discrete unit as of 2026-11-02 |
| Magnesium hydroxide per serving | 1,000 mg |
| Magnesium hydroxide per serving | Not computable as of 2026-11-02 |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Capsule sizes do not apply |
Source · NIH DSLD 23167 · label 2013-06-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
PureBulk.com Magnesium Hydroxide files 1 magnesium line in NIH DSLD 23167; the selected primary line declares 417 mg of elemental magnesium per serving, against 0 other rows excluded from the primary amount. A salt named under another nutrient does not turn that nutrient's quantity into elemental magnesium.
measured| Filed amount | Salt or note as filed | Role |
|---|---|---|
| 417 mg | hydroxide · Magnesium (Form: as Magnesium Hydroxide) | Primary serving |
Source · NIH DSLD 23167 · label 2013-06-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's hydroxide claim hold up, or could the magnesium come from another source?
The label names one magnesium form, hydroxide, resolved from the filed magnesium line; capsule capacities do not apply to this form, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| Magnesium hydroxide | 41.7% | filed magnesium line |
Source · NIH DSLD 23167 · label 2013-06-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
No US retail price is matched to this label as of 2026-11-02; 0 of 5 hydroxide labels have one, against a median of none per 100 mg among 0 ranked hydroxide offers.
computed| Rank | Label | Per 100 mg | Observed |
|---|
Source · Amazon via licensed data provider; NIH DSLD · unique ASIN × date; prices observed 2026-10-26 to 2026-11-02 · release 2026-08-10-f441aa9f · CSV · method
How many days will this bottle last at the label's own serving, and what does a day cost?
At the label's own serving, PureBulk.com Magnesium Hydroxide lasts 250 days: 250 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 250 g; 8.82 oz. |
| Serving size as filed | 1000 mg |
| Servings per container | 250 |
| Servings per day in the directions | 1 |
| Days per bottle | 250 days |
| $ per 30 days at one label serving a day | No ranked price as of 2026-11-02 |
| $ per 30 days at 420 mg Daily Value | No ranked price as of 2026-11-02 |
Source · NIH DSLD 23167 · label 2013-06-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "104% Daily Value" mean here, and does it recompute?
The label declares 104% Daily Value; 417 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 99%, a difference of 5 points. Labels filed under the earlier 400 mg reference, or with a different filing basis, show gaps of this kind.
computed
Chart data
| Displayed chart text |
|---|
| Declared vs recomputed % |
| DV |
| 99 · 104 |
| Declared vs |
| recomputed % DV |
| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 104% | 420 mg | 99% |
Source · NIH DSLD 23167; 21 CFR 101.9 · label 2013-06-25 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain these other ingredients, what shell is it, and who is it filed for?
PureBulk.com Magnesium Hydroxide files 1 other ingredient, and no magnesium stearate, against 0 of 5 hydroxide labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | None |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
| Target group | Dairy Free |
| Target group | Sugar Free |
Source · NIH DSLD 23167 · label 2013-06-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about hydroxide, and about side effects?
1 study in the PubMed-checked registry measured outcomes involving hydroxide; none reports a gastrointestinal outcome as of 2026-11-02. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2025 | Comparing the Bioavailability of Two Seawater-Derived Magnesium Preparations. | 40955524 |
Source · PubMed-checked study registry · registry checked 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Has this brand had FDA recalls or adverse event reports?
PureBulk.com has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. PureBulk.com has no FDA CAERS adverse event report on record at brand level as of 2026-10-19 (143 of 273 brands in this registry have at least one CAERS report).
measured| Recall | Date | Reason | Status |
|---|---|---|---|
| No recall record as of 2026-10-19 |
Source · openFDA enforcement and CAERS · queried 2026-10-19 · release 2026-08-10-f441aa9f · CSV · method
Is this the same formula as another brand's, and how do their prices differ?
No other brand files the same formulation (ingredients, shell, units and rounded amount) as of 2026-11-02.
computed| Label | Brand | Price per 100 mg |
|---|---|---|
| No cross-brand match as of 2026-11-02 |
Source · NIH DSLD 23167 · label 2013-06-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
No other label files the same resolved salt within ±10% of this label's dose per unit as of 2026-11-02.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| No neighbour as of 2026-11-02 |
Source · NIH DSLD 23167 · label 2013-06-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Where does this record come from, what is missing, and how do I cite or correct it?
Every value on this page traces to NIH DSLD 23167 (label 2013-06-25, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 1 gap remain: No US retail price matched as of 2026-11-02; no barcode is filed. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 23167 |
| Label date | 2013-06-25 |
| Date entered into DSLD | 2013-06-25 |
| Barcode (UPC) as filed | Not filed as of 2026-11-02 |
| Manufacturer | PureBulk.com, Roseburg, OR, USA |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Precautions re: All Other | CAUTION: Be aware that magnesium hydroxide supplementation may result in looser stools in some individuals. Serving size adjustment may be necessary. |
10 additional rows
| Field | As filed |
|---|---|
| Storage | Storage: Keep dry, cool & dark |
| Formulation re: Does NOT Contain | Free of: sugar, soy, dairy, yeast, gluten, corn and additives. |
| Suggested/Recommended/Usage/Directions | Directions: As a dietary supplement, take 1000 mg (1/4 tsp) daily, or as directed by physician. |
| General Statements: All Other Content | US Standard Measuring Spoons Spoon Size (level) milligrams 1/8 teaspoon 518 1/4 teaspoon 1036 1/2 teaspoon 2073 |
| Precautions re: Pregnant or Nursing or Prescription Medications | Warning: This product is not intended for use by those with a serious medical condition or pregnant or lactating women. |
| Precautions re: All Other | Consult your physician before use. |
| Precautions re: Children | Keep out of reach of children. |
| FDA Disclaimer Statement | These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. |
| Physical state | Powder |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 23167 · label 2013-06-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
6 brand pages linked below contain magnesium labels from the NIH DSLD registry snapshot dated 2026-08-10.